3.2 a)Yes
b)Acceleration because making it speed up and slow down is difficult to do, as compared to the other things.
c)Position-0.05s Velocit-5.5s Acceleration-I give up

4.2 a)The ball will move towards the attracting forces and away from those that repulse it. Since it gains velocity it will continue to move in the direction it was traveling even past the points. If two equal forces are acting on it causing it to be repelled or attracted then the ball will not move unless already in motion beforehand.

4.3